import java.io.*;
import java.util.ArrayList;
public class GameHelper{
    private static final String alphabet = "abcdefg";
    private int gridLength = 7;
    private int gridSize = 49;
    private int[] grid = new int[gridSize];
    private int comCount = 0;

    public String getUserInput(String prompt){
      String inputLine = null;
      System.out.println(prompt + " ");
      try{
        BufferedReader is = new BufferedReader( new InputStreamReader(System.in));
        inputLine = is.readLine();
        if (inputLine.length() == 0){
          return null;
        }
      }
      catch(IOException e){
        System.out.println("IOException: " + e);
      }
      return inputLine.toLowerCase();
    }

    public ArrayList<String> placeDotCom(int comSize){
      ArrayList<String> alphaCells = new ArrayList<String>();
      String[] alphacoords = new String[comSize];
      String temp = null;
      int[] coords = new int[comSize];
      int attempts = 0;
      boolean success = false;
      int location = 0;

      comCount++;
      int incr = 1;
      if ((comCount % 2) == 1){
        incr = gridLength;
      }

      while (!success & attempts++ < 200){
        location = (int) (Math.random() * gridSize);
        int x = 0;
        success = true;
        while (success && x < comSize){
          if (grid[location] == 0){
            coords[x++] = location;
            location += incr;
            if (location >= gridSize){
              success = false;
            }
            if (x>0 && (location % gridLength == 0)){
              success = false;
            }
          }
          else{
            success = false;
          }
        }
      }
      int x = 0;
      int row = 0;
      int column = 0;
      while (x< comSize){
        grid[coords[x]] = 1;
        row = (int) (coords[x]/gridLength);
        column = coords[x] % gridLength;
        temp = String.valueOf(alphabet.charAt(column));

        alphaCells.add(temp.concat(Integer.toString(row)));
        x++;
      }
      return alphaCells;
    }
}
